Target flow velocity = 2 m\/s<\/li>\n<\/ul>\n\nFirst, let’s convert the flow rate to cubic meters per second (m\u00b3\/s).<\/p>\n\n
50 \/ 3600<\/p>\n\n
=<\/p>\n\n
0,0139 m\u00b3\/s<\/p>\n\n
Cross-sectional Area:<\/p>\n\n
0,0139 \/ 2<\/p>\n\n
=<\/p>\n\n
0,00695 m\u00b2<\/p>\n\n
Diameter:D<\/mi>=<\/mo>4<\/mn>A<\/mi><\/mrow>\u03c0<\/mi><\/mfrac><\/msqrt><\/mrow>D=\\sqrt{\\frac{4A}{\\pi}}<\/annotation><\/semantics><\/math>D=\u03c04A\u200b\u200b<\/p>\n\nApproximate result:<\/p>\n\n
94 mm<\/strong><\/p>\n\nIn this case, considering the standard nominal sizes, a DN100 valve would be the appropriate choice.<\/p>\n\n
<\/span>Why Isn’t the Calculated Result Always Used?<\/span><\/h3>\n\nIn industrial applications, the nearest standard valve size is selected instead of using the exact calculated diameter.<\/p>\n\n
For example;<\/p>\n\nCalculation Result<\/th> Preferred DN<\/th><\/tr><\/thead> 28 mm<\/td> DN25<\/td><\/tr> 34 mm<\/td> DN32<\/td><\/tr> 47 mm<\/td> DN50<\/td><\/tr> 92 mm<\/td> DN100<\/td><\/tr> 108 mm<\/td> DN100 or DN125<\/td><\/tr><\/tbody><\/table><\/figure>\n\nTherefore, standard nominal diameters are taken as the basis for valve selection.<\/p>\n\n
<\/span>The Kv Value Should Also Be Taken Into Consideration<\/span><\/h3>\n\nThe diameter of a valve alone is not sufficient; the Kv value is also important in the selection process.
<\/span>Consequences of Incorrect Valve Diameter Selection<\/span><\/h3>\n\nIncorrect valve diameter selection can lead to the following problems:<\/p>\n\n
\nHigh energy consumption.<\/li>\n\n\n\n Excessive pressure drop<\/li>\n\n\n\n Noise and vibration<\/li>\n\n\n\n Risk of cavitation<\/li>\n\n\n\n Pump failures<\/li>\n\n\n\n Low process efficiency<\/li>\n\n\n\n Premature valve wear<\/li>\n\n\n\n High maintenance costs<\/li>\n<\/ul>\n\n<\/span>Checklist for Correct Valve Selection<\/span><\/h3>\n\nBefore ordering a valve, it is recommended to determine the following information:<\/p>\n\n
\nFluid type<\/li>\n\n\n\n Flow rate (m\u00b3\/h)<\/li>\n\n\n\n Operating Pressure<\/li>\n\n\n\n Operating temperature<\/li>\n\n\n\n Pressure difference (\u0394P)<\/li>\n\n\n\n Pipe diameter (DN)<\/li>\n\n\n\n Connection standard (DIN, ANSI, etc.)<\/li>\n\n\n\n Valve type (ball, butterfly, globe, gate, etc.)<\/li>\n\n\n\n Actuator requirement (manual, pneumatic, or electric)<\/li>\n<\/ul>\n\n<\/span>Conclusion<\/span><\/h5>\n\nValve diameter selection should not be based solely on the pipe size. Flow rate, flow velocity, pressure drop, fluid properties, and the valve\u2019s Kv value should all be evaluated together. A properly calculated and correctly selected valve according to the appropriate standard ensures more efficient system operation, reduces energy costs, and extends equipment service life. <\/p>\n\n
In professional projects, valve selection should be based on both manufacturer technical catalogs and engineering calculations.<\/p>\n","protected":false},"excerpt":{"rendered":"
Selecting the correct valve diameter is critical to the performance and efficiency of industrial systems. In many cases, users choose<\/p>\n","protected":false},"author":1,"featured_media":71787,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1715],"tags":[],"class_list":["post-72479","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unox-blog"],"_links":{"self":[{"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/posts\/72479","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/comments?post=72479"}],"version-history":[{"count":1,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/posts\/72479\/revisions"}],"predecessor-version":[{"id":72480,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/posts\/72479\/revisions\/72480"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/media\/71787"}],"wp:attachment":[{"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/media?parent=72479"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/categories?post=72479"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unox.com.tr\/en\/wp-json\/wp\/v2\/tags?post=72479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}